迁移 0033:邮箱账号 / 入站 / 投递 / 出站四张表;mail store 与跨进程租约(两连接对抢 20 轮每轮一个赢)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TM4kUBvekALu9qqmp7D3wr

db/migrations/0033_mail.sql

@@ -0,0 +1,92 @@
+-- 邮件收发(ADR-013):账号(配置 + 密封凭证 + 游标 + 跨进程租约)、入站留痕、逐订阅方投递留痕、出站留痕。
+--
+-- 腾讯企业邮箱两条接入路(IMAP/SMTP · 企业微信邮件 API)都没有带内容的推送,只能轮询拉:
+-- 两个后端连同一个库时,一个信箱同一时刻只许一个进程在拉 —— `polling_until` 与
+-- `sys.task.advancing_until` 同款(一条 SQL 判 + 占,带过期时间,进程崩了不锁死)。
+-- 入站两把唯一键:重复拉到(时钟偏 / UIDVALIDITY 重锚 / wecom 十分钟重叠窗)一律静默跳过。
+-- 入站 / 出站表对账号**不设外键**:账号删了留痕还在。
+create table if not exists sys.mail_account (
+  id                text primary key,
+  name              text not null,
+  kind              text not null check (kind in ('imap-smtp', 'wecom')),
+  address           text not null default '',
+  display_name      text not null default '',
+  enabled           boolean not null default true,
+  is_default        boolean not null default false,
+  poll_interval_sec integer not null default 30 check (poll_interval_sec between 10 and 3600),
+  channel_id        text,
+  backfill_from     timestamptz,
+  settings          jsonb not null default '{}'::jsonb,
+  secret_cipher     text,
+  cursor            jsonb,
+  last_polled_at    timestamptz,
+  last_poll_error   text,
+  last_inbound_at   timestamptz,
+  polling_until     timestamptz,
+  created_at        timestamptz not null default now(),
+  updated_at        timestamptz not null default now()
+);
+create unique index if not exists mail_account_name_key on sys.mail_account (name);
+-- 默认发件账号至多一个 —— 用例先把别的置 false,这道索引兜底
+create unique index if not exists mail_account_one_default on sys.mail_account ((true)) where is_default;
+create index if not exists mail_account_due_idx on sys.mail_account (enabled, last_polled_at);
+
+create table if not exists sys.mail_inbound (
+  id             text primary key,
+  account_id     text not null,
+  message_id     text not null,
+  provider_ref   text not null,
+  in_reply_to    text,
+  reference_ids  jsonb not null default '[]'::jsonb,
+  from_addr      text not null default '',
+  from_name      text not null default '',
+  to_list        jsonb not null default '[]'::jsonb,
+  cc_list        jsonb not null default '[]'::jsonb,
+  subject        text not null default '',
+  text_body      text,
+  html_body      text,
+  sent_at        timestamptz,
+  received_at    timestamptz not null,
+  attachments    jsonb not null default '[]'::jsonb,
+  raw            bytea,
+  raw_note       text not null default '',
+  size           integer not null default 0,
+  created_at     timestamptz not null default now()
+);
+create unique index if not exists mail_inbound_message_key on sys.mail_inbound (account_id, message_id);
+create unique index if not exists mail_inbound_provider_key on sys.mail_inbound (account_id, provider_ref);
+create index if not exists mail_inbound_time_idx on sys.mail_inbound (received_at desc);
+
+create table if not exists sys.mail_inbound_delivery (
+  mail_id     text not null references sys.mail_inbound(id) on delete cascade,
+  subscriber  text not null,
+  state       text not null check (state in ('dispatching', 'done', 'failed', 'skipped')),
+  error       text,
+  started_at  timestamptz not null default now(),
+  finished_at timestamptz,
+  primary key (mail_id, subscriber)
+);
+
+create table if not exists sys.mail_outbound (
+  id              text primary key,
+  account_id      text not null,
+  message_id      text not null,
+  idempotency_key text,
+  to_list         jsonb not null,
+  cc_list         jsonb not null default '[]'::jsonb,
+  bcc_list        jsonb not null default '[]'::jsonb,
+  subject         text not null,
+  text_body       text,
+  html_body       text,
+  in_reply_to     text,
+  reference_ids   jsonb not null default '[]'::jsonb,
+  attachments     jsonb not null default '[]'::jsonb,
+  state           text not null check (state in ('sending', 'sent', 'failed')),
+  error           text,
+  provider_ref    text,
+  requested_by    jsonb not null default '{}'::jsonb,
+  created_at      timestamptz not null default now(),
+  sent_at         timestamptz
+);
+create unique index if not exists mail_outbound_idem_key on sys.mail_outbound (idempotency_key) where idempotency_key is not null;
+create index if not exists mail_outbound_time_idx on sys.mail_outbound (created_at desc);

db/migrations/meta/_journal.json

@@ -232,6 +232,13 @@
       "when": 1785130120180,
       "tag": "0032_keycloak_identity",
       "breakpoints": true
+    },
+    {
+      "idx": 33,
+      "version": "7",
+      "when": 1785130120181,
+      "tag": "0033_mail",
+      "breakpoints": true
     }
   ]
 }